Demo configs should be passive

[ChristianMayer]

Opening a demo config might result in unwanted bus communication.

It would be better when a demo config is (at least by default) passive, i.e. doesn't create a Bus communication.
Optimal would be a popup warning about it and giving the user the chance to select a passive mode (= widgets don't really work) or a live mode (= responsibility about side effect are by the user).

Best would be a new backend type that doesn't create any bus communication but still allows the widgets to work.
The homepage demo might be a starting point for that.

[ChristianMayer]

https://forum.timberwolf.io/viewtopic.php?p=38228#p38228